Electric battery.



No. 705,|4s. Patented luly 22, 1902.

. m. w. nosmsofl.

ELECTRIC BATTERY; (Appli ion filed May 11, 1901.)

' (No Model.)

"MINNIE-NW UNITED STATES PAENT OFFICE.

MARTIN W. ROBINSON, OF MEDFORD, MASSACHUSETTS.

ELECTRIC BATTERY.

SPECIFICATION forming part of Letters Patent No. 705,148, dated July 22,1902.

Application filed May 11,1901. Serial No. 59,775. (No model.)

To whom it may concern:

Be it known that I, MARTIN W. ROBINSON, of Medford, in the county ofMiddlesex and State of Massachusetts, have invented a new and usefulImprovement in Electric Batteries, of which the following, taken inconnection with the accompanyin g drawings, is a specification.

My invention relates to electric batteries; and the principal object ofthe same is to protide a durable or permanent non-frangible cathode oinegative element for galvanic batteries.

The carbon cathodes in common use are liable to be broken in handling ifmade tl1in,and if made of a thickness to be strong a free circulation ofthe bath liquid is impeded to some extent.

In carrying out my invention I form the cathode of a thin copper platehaving a number of openings or perforations therein to permit a freecirculation of the bath solution, said copper plate being coated withnickel after the openings or perforations have been formed in saidplate, so that the entire surface of the cathode exposed to the bath isrendered impervious to the action of the bath solution. Such a cathodemay be made comparatively thin and will not be liable to break= age inshipping or handling and may be used inconnection with the usual z'incelement in a bath composed of the usual constituents;

tional View of the cathode.

In said drawings the numeral 1 designates a non conducting cup forcontaining a bath solution 2,said solution being composed, preferably,of bichromate of sodium or a solution of the same and sulfuric acid inproper proportions. The cathode 3 consists of a copper plate 4., havinga series of openings or perforations 5 therein to permit a freecirculation of the bath solution. The copper plate 4 is coated or platedwith nickel 6, said nickel being impervious to the action of the bath solution. As shown in the drawings, a series of these nickel-plated copperplates 4 are utilized, and they are connected together by a screw 7,passing through alined apertures 8, formed in ears 9 on the upper endsof the plates. Rings or washers 10 are used to hold the plates therequired distance apart, and a thumb-nut 11 fits the threaded end of thescrew 7 to bind the plates together. Small butters 12, made of someimpervious or nonconducting material, like vulcanite or Vulcanizedfiber, are secured in suitable openings in the upper and lower portionsof the plates l, said buffers extending upon opposite sides of theplates 4 to prevent contact of the zinc elements 13 with the cathodes 4.The zinc plates 13 are also secured together by a binding-screw 14,passing through a tu bular washer 15 between the plates 13.

It will be understood that any suitable number of the plates 4 and 13may be alternately disposed in the bath and held out of contact by thebutters 12 and that owing to the fact that the cathodes arecomparatively thin very little space is necessary to accommodate quite alarge number.

Having thus fully described my invention, what I claim is- 1. A cathodecomposed of a nickel'plated copper plate, having non-conducting buiterssecured thereto in combination with interme diate zinc platesalternately arranged, substantially as described.

2. A cathode composed otperforated nickelplated copper plates connectedtogether bya bindingscrew, and intermediate zinc plates, substantiallyas described.

3. A galvanic battery consisting of nickelplated copper cathodes andzinc anodes im= mersed in a bath composed of bichromate of sodium andsulfuric acid, substantially as described.

4. A galvanic battery consisting of perforated nickel-plated coppercathodes, secured together bya binding-screw, and zinc anodes ing theplates apart, substantially as deranged intermediate the cathodes, saidelescribed. ments being immersed in a bath composed of In testimonywhereof I have signed my bichromate of sodium and sulfuric acid, subnameto this specification, in the presence of 15 secured together by aseparate screw and ar- 5 stantially as described. two subscribingWitnesses, on this 5th day of 5. The herein-described battery elements,April, A. D. 1901. consisting of perforated copper plates coated withnickel and secured together by a bind- MARI IN ROBINSON ing-screw, andzinc plates located interme- Witnesses: IO diate the copper plates andconnected by a WM. B. H. DOWSE,

screw, and non-conducting buffers for hold- A. H. FLANNERY.

